Gang C Hou

US Patent:

6411634, Jun 25, 2002

Filed:

Nov 12, 1998

Appl. No.:

09/189924

Inventors:

Qin Zhang - San Jose CA
Wen hui Wang - San Jose CA
Gang Hou - San Jose CA

Assignee:

Oplink Communications, Inc. - San Jose CA

International Classification:

H01S 313

US Classification:

372 32, 372 18, 372 20, 354233, 354234, 354236, 354341

Abstract:

A system and method for providing a wavelength locker is disclosed. In one aspect, the method and system include providing a reflector, a first filter, and a second filter. The reflector is for receiving an optical signal, transmitting a first portion of the optical signal, and reflecting a second portion of the optical signal. The first filter is for receiving the first portion and transmitting a third portion of the optical signal. The first filter includes a first axis and is capable of being tuned by rotation around the first axis to transmit the third portion including a particular wavelength. The second filter is for receiving the third portion and transmitting a fourth portion of the optical signal. The second filter includes a second axis substantially perpendicular to the first axis and is capable of being tuned by rotation around the second axis to transmit the fourth portion including the particular wavelength. In one aspect, the method and system also include photodetectors to receive the second and fourth portions of the optical signal.